lpc.c File Reference

#include <math.h>
#include "include/FLAC/assert.h"
#include "include/FLAC/format.h"
#include "include/share/compat.h"
#include "include/private/bitmath.h"
#include "include/private/lpc.h"
#include "include/private/macros.h"

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Macros
#define	FLAC__LPC_UNROLLED_FILTER_LOOPS

Functions
void	FLAC__lpc_window_data (const FLAC__int32 in[], const FLAC__real window[], FLAC__real out[], unsigned data_len)
void	FLAC__lpc_compute_autocorrelation (const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[])
void	FLAC__lpc_compute_lp_coefficients (const FLAC__real autoc[], unsigned *max_order, FLAC__real lp_coeff[][FLAC__MAX_LPC_ORDER], double error[])
int	FLAC__lpc_quantize_coefficients (const FLAC__real lp_coeff[], unsigned order, unsigned precision, FLAC__int32 qlp_coeff[], int *shift)
void	FLAC__lpc_compute_residual_from_qlp_coefficients (const FLAC__int32 *flac_restrict data, unsigned data_len, const FLAC__int32 *flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 *flac_restrict residual)
void	FLAC__lpc_compute_residual_from_qlp_coefficients_wide (const FLAC__int32 *flac_restrict data, unsigned data_len, const FLAC__int32 *flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 *flac_restrict residual)
void	FLAC__lpc_restore_signal (const FLAC__int32 *flac_restrict residual, unsigned data_len, const FLAC__int32 *flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 *flac_restrict data)
void	FLAC__lpc_restore_signal_wide (const FLAC__int32 *flac_restrict residual, unsigned data_len, const FLAC__int32 *flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 *flac_restrict data)
double	FLAC__lpc_compute_expected_bits_per_residual_sample (double lpc_error, unsigned total_samples)
double	FLAC__lpc_compute_expected_bits_per_residual_sample_with_error_scale (double lpc_error, double error_scale)
unsigned	FLAC__lpc_compute_best_order (const double lpc_error[], unsigned max_order, unsigned total_samples, unsigned overhead_bits_per_order)

Macro Definition Documentation

FLAC__LPC_UNROLLED_FILTER_LOOPS

#define FLAC__LPC_UNROLLED_FILTER_LOOPS

Function Documentation

FLAC__lpc_compute_autocorrelation()

void FLAC__lpc_compute_autocorrelation	(	const FLAC__real	data[],
		unsigned	data_len,
		unsigned	lag,
		FLAC__real	autoc[]
	)

FLAC__lpc_compute_best_order()

unsigned FLAC__lpc_compute_best_order	(	const double	lpc_error[],
		unsigned	max_order,
		unsigned	total_samples,
		unsigned	overhead_bits_per_order
	)

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FLAC__lpc_compute_expected_bits_per_residual_sample()

double FLAC__lpc_compute_expected_bits_per_residual_sample	(	double	lpc_error,
		unsigned	total_samples
	)

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FLAC__lpc_compute_expected_bits_per_residual_sample_with_error_scale()

double FLAC__lpc_compute_expected_bits_per_residual_sample_with_error_scale	(	double	lpc_error,
		double	error_scale
	)

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FLAC__lpc_compute_lp_coefficients()

void FLAC__lpc_compute_lp_coefficients	(	const FLAC__real	autoc[],
		unsigned *	max_order,
		FLAC__real	lp_coeff[][FLAC__MAX_LPC_ORDER],
		double	error[]
	)

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FLAC__lpc_compute_residual_from_qlp_coefficients()

void FLAC__lpc_compute_residual_from_qlp_coefficients	(	const FLAC__int32 *flac_restrict	data,
		unsigned	data_len,
		const FLAC__int32 *flac_restrict	qlp_coeff,
		unsigned	order,
		int	lp_quantization,
		FLAC__int32 *flac_restrict	residual
	)

FLAC__lpc_compute_residual_from_qlp_coefficients_wide()

void FLAC__lpc_compute_residual_from_qlp_coefficients_wide	(	const FLAC__int32 *flac_restrict	data,
		unsigned	data_len,
		const FLAC__int32 *flac_restrict	qlp_coeff,
		unsigned	order,
		int	lp_quantization,
		FLAC__int32 *flac_restrict	residual
	)

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FLAC__lpc_quantize_coefficients()

int FLAC__lpc_quantize_coefficients	(	const FLAC__real	lp_coeff[],
		unsigned	order,
		unsigned	precision,
		FLAC__int32	qlp_coeff[],
		int *	shift
	)

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FLAC__lpc_restore_signal()

void FLAC__lpc_restore_signal	(	const FLAC__int32 *flac_restrict	residual,
		unsigned	data_len,
		const FLAC__int32 *flac_restrict	qlp_coeff,
		unsigned	order,
		int	lp_quantization,
		FLAC__int32 *flac_restrict	data
	)

FLAC__lpc_restore_signal_wide()

void FLAC__lpc_restore_signal_wide	(	const FLAC__int32 *flac_restrict	residual,
		unsigned	data_len,
		const FLAC__int32 *flac_restrict	qlp_coeff,
		unsigned	order,
		int	lp_quantization,
		FLAC__int32 *flac_restrict	data
	)

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FLAC__lpc_window_data()

void FLAC__lpc_window_data	(	const FLAC__int32	in[],
		const FLAC__real	window[],
		FLAC__real	out[],
		unsigned	data_len
	)